README.md: Remove link to deprecated wiki

Change-Id: I4af62fdf4bfc34433d9f7dcf32acd1078b533a43
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36872
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

README.md

@@ -34,7 +34,6 @@ coreboot supports a wide range of chipsets, devices, and mainboards.
 For details please consult:
 
  * <https://www.coreboot.org/Supported_Motherboards>
- * <https://www.coreboot.org/Supported_Chipsets_and_Devices>
 
 
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